package com.lilihub.miaosha.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.lilihub.miaosha.util.CodeUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;

/**
 * @BelongsProject: miaosha
 * @BelongsPackage: com.lilihub.miaosha.controller
 * @Author: LiYing
 * @CreateTime: 2021-04-30 11:30
 * @Description:
 */
@Controller
public class KaptchaController {


    @Autowired
    private Producer captchaProducer = null;


    @RequestMapping("kaptchaTest")
    public String kaptchaTest(){

        return "TestKaptcha";
    }


    @ResponseBody
    @RequestMapping("/kaptcha")
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
        HttpSession session = request.getSession();
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");

        //生成验证码
        String capText = captchaProducer.createText();
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

        //向客户端写出
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
    }

    @ResponseBody
    @RequestMapping("/kaptchaForm")
    public String kaptchaForm(HttpServletRequest request) {
        if (!CodeUtil.checkVerifyCode(request)) {
            return "验证码有误！";
        } else {
            return "kaptcha test pass";
        }
    }

}
